Gun-mount brake



E. F. NORELIUS.

GUN MOUNT BRAKE.

APPLICATION FILED AUG.2'7, 191-9.

1,429,450., P tentedsept' 19, 19.22;

4 SHEETS-SHEET INVENTOR A'rroRNmYs E. F. NORELIUS.

GUN MOUNT BRAKE.

APPLICATION FILED AUG.27. 1919.

1,429,450, PatentedSept. 19, 1922.

4 SHEETS-SHEET 2.

. I I I I I 1 I t mull" I l flllllllli IN VENTO R ATTORNEYS E. F. NORELIUS.

GUN MOUNT BRAKE.

. APPLICATION FILED AUG.27, 1919. 1 429 450 PatentedSept. 19, 1922.

4 SHEETS-SHEET 3.

E. F. NORELIUS.

GUN MOUNT BRAKE.

APPLICATION FILED Aue.27, 1919v 1,429,450. PatentedSept. 19, 1922.

4 SHEEJS SHE'L'T 4.

\ M1 v I I IN VENTOR flZ'Z ZFZ GPE Zzkzs B ATTORNEYS Patented Sept. 19, 1922.

PATENT OFFICE.

EMIL I. N ORELIUS, OF PEORIA, ILLINOIS, ASSIGNOR TO THE HOIQ'I MANUFACTURING COMPANY, OF STOCKTON, CALIFORNIA, A CORPORATION OF CALIFORNIA.

GUN-MOUNT BRAKE.

Application filed August 27, 1919. Serial No. 320,238.

To all whom it may cancer-a:

Be it known that I, EMIL F. NORELIUS, a citizen of the United States, residin at Peoria, in the county of Peoria and tate 6 of Illinois, have invented a new and useful Improvement in Gun-Mount Brakes, of which the following is a Specification.

This invention relates to tractor gun' mounts, and .more especially to a brake forj tractor truck mechanism whereby the force of recoil of a gun is counteracted.

A chain track type of tractor is used as a gun mount and has an internal expanding brake fixed upon the driving sprocket wheels, said brakes being capable of being set 'so that when the gun recoils the driving sprocket wheels will be held or restrained against turning, with the result that the tractor will be held more or less in position and the force of the recoil will be taken up by the usual recoil mechanism of the gun.

Brake mechanism heretofore used in connection with tractors of this type has been applied to the transmission mechanism, but to attempt to use such brakes for the present purpose would impose severe and disastrous strains upon the comparatively delicate driving mechanism. In the present device I apply the brake mechanism directly to the driving sprocket wheels so that danger of breakage is not present and the action of the brake is more direct and effective.

Referring to the accompanying drawings:

Fig. 1 shows a side elevation of a tractor gun mount embodying my invention.

Fig. 2 shows a side elevation of the brake band and hand wheel for manipulating the brakes.

Fig. 3 shows a sectional view of the driv- 40 ing sprocket wheel and connected brake mechanism taken on the line 33 of Fig. 2.

Fig. 1 shows a detail sectional View of one of the pins for fastening the hand wheel in place.

Fig. 5 shows a circumferentlal sectional view of the brake mechanism taken on the line 55 of Fig. 6.

Fig. 6 shows a sectional View taken on the line 66 of Fig. 5.

Fig. 7 shows a sectional View 1n plan of a conventional type of drivlng mechan sm for the toothed sprocket wheels, to which sprocket wheels the brake mechanism is appliedu Fig. 8 shows a plan view, partly in section, of a continuation of the driving and transmission mechanism of Fig. 7.

The tractor gun mount shown herein may comprise a main frame 10 on which a gun 11 is mounted, this frame carrying and supportin also an engine and other operating parts or driving the tractor. At each side of the main frame is a tractor truck mechanism comprising a truck frame 12 fitted with a series of flanged rollers 13 at its lower edge and with an idler. sprocket wheel 14 at its forward end. The main frame is carried directly upon and supported by these truck frames 12 in any one of several different well known Ways, preferably so as to-cushion the main frame and to allow more or less rocking movement of the truck mechanismsin 17 supported upon an axle 18. and connected to the toothed sprocket wheel by means of a sleeve 19. A spur pinion 20 meshes with the gear 17 and is connected by means of a sleeve a or hub to a second spur gear'21, which, in

turn, meshes with ,a second spur pinion 22.

The last-named spur pinion 1s driven from a fore and aft extending propeller shaft 23 through the medium of bevel gears 24. All of said gears and connected parts are journaled'in a housing 25 carried upon the main frame.

Upon each of the toothed sprocket wheels 16 is formed a drum or band 26 on the exterior face thereof and within this band is arranged a spider 27 fixed upon a sleeve 28, which sleeve is mounted loosely on an extension 29 of the axle 18 of the driving wheel. The spider is held against turning movement by means of a bar or link 30 connected thereto and to the adjacent truck 1 frame 12. A pair of brake segments 31 is carried upon the spider 27 and they are movable radially by means'of oppositely extending screw shafts 32 fed by a sleeve 33, which sleeve is turned by a spiral gear 34. A worm gear 35 is formed on a sleeve 36, which sleeve is journaled on the sleeve 28. For turning the sleeve 36 for the purpose of manipulating the screw feed device I provide a hand wheel 37 at the exterior of the brake mechanism, said hand wheel being fastened to a flange on the sleeve 36 by meansof'bolts 38 working in slots 39 formed on the inner portion of the hand wheel. These bolts 38 are spring pressed to hold them in place and the slots 39 are provided near their centers with enlarged portions to ermit the heads of the bolts to pass throug when it is desired to remove the hand wheel.

In the operation of the device the gun is set in firing position and thereafter thev brakes are set by means of the hand wheel 37. The force of the, recoil of the gun is transmitted to the truck mechanism in a direction to drive the tractor rearwardly as a whole, but to so move the tractor it is necessary that the toothed sprocket wheels turn, inasmuch as these sprocket wheels mesh with the chain track and the chain track in a machine of this character will not allow of any slippa e. However, since these toothed sprocket w eels are restrained against turning movement by the brake mechanism described, it will be seen that the tractor will be held more vor less in position and the force of the recoil will necessarily have to be taken up by the recoi mechanism of the gun.

It will be understood that the presentmehanism is more effective than ordinary wheel brakes used on round wheels, since such round wheels will slide or slip'even when braked. The present brake mechanism may be set to take up as much or as little of the recoil as desired. When the tractor is being moved from one position to another theihand wheels for setting the brakes may be taken off on account of the detachable connections described.

I wish it understood that various changes in the construction, combination and arrangement of parts may be resorted to without departing from the spirit of my invention as disclosed in the appended claims.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. lln a tractor, a main frame, .a chain track truck mechanism at each side of the main frame, said truck mechanism 'includ-' ing an endless chain track, a toothed sprocket wheel for driving the same and a load carrying truck within the track, a brake mechanism arranged ,on said sprocket wheel to restrain the latter against turn ing movement by thrusts imparted to it by the main frame, said brake mechanism comwheel, internally expanding shoes co-operating with the drum and means connected with the load-carrying truck to hold the brake shoes against turning movement.

2. In a tractor, a main frame, a chain track truck mechanism at each side thereof,

thrusts imparted to it by the main frame,

said brake mechanism comprising a brake drum fixed upon the sprocket wheel, a spider carried within the drum and mounted loosely upon the axle of the sprocket wheel, means between the load carrying truckand the spider to prevent turning movement of the latter and internally expanding brake shoes carried by the spider for co-operation with the drum.

3. In a tractor, a main frame, a chain track truck mechanism at each side, each truck mechanism including an endless chain track, a driving sprocket wheel therefor prising a drum fixed upon the sprocketv and a load carrying truck within the track, 295

a drum fixed upon the sprocket wheel, a

spider loosely mounted on the axle of the sprocket wheel, internally expanding brake shoes carried upon the spider, means to prevent turning of the spider on the axle, screw shafts to move the brake shoes radially, a screw-threaded sleeve to operate said shafts andworm gearing to operate said screwthreaded sleeve.

4. In a tractor, a main frame, a chain track truck mechanism at each side thereof, each including an endless, track, a driving sprocket wheel and a load carrying truck within the track, a drum fixed upon the sprocket wheel, a "spider loosely mounted on the axle of the sprocket wheel, internally expanding brake shoes carried by the spider, means to prevent turning movement of the spider on the axle, screw-threaded connections to operate the brake shoes radially,

a worm gear loosely mounted on the axle ,chain track and a toothed sprocket wheel co-operating with said track, a brake mechanism, arranged on said toothed sprocket wheel to restrain the latter against turning movement to prevent mo ement of the truck mechanism under the shock of recoil of the gun, said brake mechanism comprise ing a brake d 'u n fixed upon the toothed In testimony whereof I have hereunto sprocket wheel, a spider carried within the set my hand inthe presence of twosubscribdrum and held-against turning movement, ing witnesses.

a pair of brake shoes carried by the spider, EMIL F. NORELIUS. 5 and a. hand wheel at the outside of the Witnesses: sprocket wheel operatively connected with LOUIS B. NEUMILLER,

the brake shoes for setting the letter. FRED Gso'rrs. 

